A 14-year-old child with white patches on his face may be due to white furfur, vitiligo and other causes. 1. white chaff rash: common in children and adolescents, preferably in the face, neck and other parts, manifested as white patches, round or oval in shape, the surface covered with white fine scales. It may be related to malnutrition, vitamin deficiency and so on. 2. Vitiligo: Vitiligo may be related to autoimmune, genetic factors, can occur at any age, occurring in the face, neck, back of the hands and other parts of the face, manifested in different sizes of white patches. The face of the white block may also be unpigmented nevus, lichen planus, etc. It is recommended to go to the dermatologist, under the guidance of the doctor to clarify the cause of the disease, and then targeted treatment.